Alarm mechanism



F. V. PEPPER.

ALARM MECHANISM. APPLICATION FILED J-AN.4, 1921.

1,398,340. Patented Nov. 29, 192-1.

re t FREDERICK V. PEPPER, OF LOS ANGELES; CALIFORNIA.

ALARM MECHANISM.

Application filed January 4, '1921.

T all 1/; 7mm it may concern:

Be it known that I, Fnnonnron V. Pnrrun, a citizen of the United States, residing at the city of Los Angeles, county of Los Angeles, State of California, have invented new and useful Improvements in Alarm Mechanism, of which the following is a specification.

My invention relates to an alarm mechanism which is simple and inexpensive in construction and which can be quickly and easily attached to or detached from a door or window; and the object thereof is to provide a mechanism which can be set to be actuated when the door or window sash is moved an appreciable distance toward opening the same and which will continue its signal until the actuating spring is unwound or until it is stopped. In the drawings forming a part of this application Figure 1. is a side elevation of my mechanism in position to be operated, and placed on a door a fragment of which and the jamb adjacent thereto are shown in section. Fig. 2 is a section on the line 2-2 of Fig. 1. Figs. 3, 4 and 5 are enlarged details.

Referring to the drawings is a door and 11 a jamb, both of which are of ordinary construction. My alarm mechanism consists of a base plate 12 to which a cup shaped casing 13 is secured by riveting or in any other manner. Plate 12 has an upturned arm 14 the upper end 15 of which turns outwardly and is pierced for the passage therethrough of the attaching bolt 16 which has a wing nut 17 on the outer end thereof. The other end of the attaching bolt is flattened and passes through ears 18 struck up from arm 14. The extreme end 19 is turned at right angles to the other portion to form a grip by means of which the device may be attached to the door as shown in Fig. 1, or to a window sash as hereafter explained. Within casing 13 is arranged an alarm clock mechanism which in part consists of bell 20, which also serves as a cover for casing 13 and as a key for winding the mainspring 21, being attached to shaft 22 to which spring 21 is secured in the usual manner. The usual ratchet wheel 23 of said mechanism coacts with an oscillating member 24 mounted on shaft 25. Shaft 25 carries bell hammer 26. The parts thus far described are of the usual alarm clock mechanism so far as the alarm feature is concerned. Adjacent to shaft 25 is a second Specification of Letters Patent.

Patented Nov. 29, 1921.

Serial No. 434,952.

shaft 27 to which are secured an operating arm 29 and pins 28 and 30. cured thereto a spring 31 the other end of which is attached to the casing. Pin is adapted to engage member 24 as shown in Fig. 2 when the device is set in operative position. Arm 29 projects through a slot 32 in the casing and may be engaged by a hook 33 rockably mounted on the casing so as to prevent the operation of the alarm. A lever 34'is rockably mounted to a bearing 35 struck up from casing 13 and has a lug 36 which when the device is positioned for use projects in front of pin 28 mounted in shaft 27 thereby holding member 24 against movement.

Operation.

With the spring wound up arm 29 is locked by hook 333. The device is then positioned and secured to the door as shown in Fig. 1. This brings lever 34 against jamb 11 with lug 36 in front of pin 28, when the door is shut. The hook is then detached from arm 29. Should the door he opened )in 28 causes lever 34 to remain in contact with the jamb until lug 36 is withdrawn from in front of pin 28 thereby releasing pin 30 from engaging member 24 when the alarm is free to ring until it runs down or is stopped by some one within the room. When applied to a double sash win dow I attach the base plate to the lower sash and arm 34 projects so that the outer end is over the upper sash. T secure a slotted contact bar 38 to the outer end of arm 34 by a thumb screw 39 so that the contact bar can be adjusted topermit the lower sash to be raised or the upper sash to be lowered. When either sash is moved the alarm mechanism is operated as in the door movement. My device can also be applied to a transom in the same manner as to a door. The upper ends of shafts 25 and 27 are mounted in plate 40 secured to stud bolts 41 mounted in the base plate. Lever 34 may be called a trigger. Trigger 34 is actuated by spring 42 to cause lug 36 to move from in front of pin 28 as the door or window is'operated.

Having described my invention I claim.

1. In an alarm the combination of a base plate having an upturned arm with the end turned outward and pierced; an attaching bolt mounted in said arm; a cup shaped casing secured to said plate; an

Arm 29 has se-' alarm clock mechanism mounted in said casing, the bell of which forms a cover for said casing and means to wind the spring; another shaft mounted in said casing, said last shaft having an operating arm that projects through a slit in the casing and a plu- V rality of projecting pins one of said pins being adapted to engage the oscillating member of the alarm mechanism and prevent its operation when the device is positioned and set for use, and another pin being adapted to engage the trigger lug when positioned and set for use; anda trigger adapted to hold the other parts of the device against operation as long as the door or window oring through the arm and a flattened portion passing through the lugs and a grip on the flattened end; and a nut on said threaded part; in combination with an alarm clock mechanism.

3. In an alarm mechanism the combination of an alarm clock mechanism; a shaft having a pin to hold the alarm mechanism from operating when held against rotation; an operating lever secured to said shaft; a second pin mounted in said shaft; a trigger having a lug adapted to be positioned in front of said last pin and when so positioned to hold said shaft from rotation when said trigger is held; and means to hold said mechanism upon a door or Window or transom.

In Witness that I claim the foregoing I have hereunto subscribed my name this 27th day of December 1920.

FREDERICK V. PEPPER. 

